add a blank node when previewing empty graph

4 files changed, 20 insertions, 2 deletions

diff --git a/src/data/tikzdocument.cpp b/src/data/tikzdocument.cpp
index b89da10..1099779 100644
--- a/src/data/tikzdocument.cpp
+++ b/src/data/tikzdocument.cpp
@@ -148,6 +148,11 @@ QString TikzDocument::fileName() const
     return _fileName;

 }

 

+bool TikzDocument::isEmpty()

+{

+    return _graph->nodes().isEmpty();

+}

+

 void TikzDocument::addToRecentFiles()

 {

     QSettings settings("tikzit", "tikzit");

diff --git a/src/data/tikzdocument.h b/src/data/tikzdocument.h
index 3b5990a..ad5499f 100644
--- a/src/data/tikzdocument.h
+++ b/src/data/tikzdocument.h
@@ -54,6 +54,8 @@ public:
 

     QString fileName() const;

 

+    bool isEmpty();

+

 private:

     Graph *_graph;

     QString _tikz;

diff --git a/src/gui/latexprocess.cpp b/src/gui/latexprocess.cpp
index d267bf5..8d720d5 100644
--- a/src/gui/latexprocess.cpp
+++ b/src/gui/latexprocess.cpp
@@ -38,7 +38,7 @@ LatexProcess::LatexProcess(PreviewWindow *preview, QObject *parent) : QObject(pa
     connect(_proc, SIGNAL(finished(int)), this, SLOT(finished(int)));
 
     // for debug purposes
-    _workingDir.setAutoRemove(false);
+    //_workingDir.setAutoRemove(false);
 }
 
 void LatexProcess::makePreview(QString tikz)
@@ -76,6 +76,10 @@ void LatexProcess::makePreview(QString tikz)
             // common windows tex directories
             texDirs << "C:\\Program Files\\MiKTeX 2.9\\miktex\\bin";
             texDirs << "C:\\Program Files\\MiKTeX 2.9\\miktex\\bin\\x64";
+            texDirs << "C:\\Program Files\\MiKTeX 2.8\\miktex\\bin";
+            texDirs << "C:\\Program Files\\MiKTeX 2.8\\miktex\\bin\\x64";
+            texDirs << "C:\\Program Files\\MiKTeX 2.7\\miktex\\bin";
+            texDirs << "C:\\Program Files\\MiKTeX 2.7\\miktex\\bin\\x64";
 
             _output->appendPlainText(texDirs.join(":"));
             pdflatex = QStandardPaths::findExecutable("pdflatex", texDirs);
diff --git a/src/tikzit.cpp b/src/tikzit.cpp
index 2a7c00a..06777d1 100644
--- a/src/tikzit.cpp
+++ b/src/tikzit.cpp
@@ -429,7 +429,14 @@ void Tikzit::makePreview()
         }
 
         connect(_latex, SIGNAL(previewFinished()), this, SLOT(cleanupLatex()));
-        _latex->makePreview(activeWindow()->tikzSource());
+
+        if (activeWindow()->tikzDocument()->isEmpty()) {
+            _latex->makePreview("\\begin{tikzpicture}\n"
+                                "  \\node [style=none] (0) at (0,0) {};\n"
+                                "\\end{tikzpicture}\n");
+        } else {
+            _latex->makePreview(activeWindow()->tikzSource());
+        }
         _preview->show();
     }
 }